Added readme explaining installation, because I can never remember

Author: Stewart Gleadow

README.markdown

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+# WaxSim
+
+A wrapper around iPhoneSimulatorRemoteClient, to install and run apps in the iOS simulator.
+
+## Installation
+
+Compiling and installing uses the `xcodebuild` command. By default it installs the app in `/usr/local/bin`.
+
+`xcodebuild install`
+
+To customize the installation location use the `DSTROOT` and `INSTALL_PATH` build variables. For example, to compile into a local `bin` directory:
+
+`xcodebuild install DSTROOT=. INSTALL_PATH=/bin`
+
+## Use
+
+`waxsim "/path/to/MyApp.app"`
+
+If you want to define which family of iOS device to use:
+
+`waxsim -f "ipad" "/path/to/MyApp.app"`
+
+To see all usage options, type `waxsim` with no arguments:
+
+```
+usage: waxsim [options] app-path
+example: waxsim -s 2.2 /path/to/app.app
+Available options are:
+  -s sdkVersion number of sdk to use (-s 3.1)
+  -f familyDevice to use (-f ipad)
+  -e VAR=valueEnvironment variable to set (-e CFFIXED_HOME=/tmp/iphonehome)
+  -a DependenciesAvailable SDKs
+  -v pathOutput video recording at path
+  -h DependenciesPrints out this wonderful documentation!
+```
+
+## Dependencies
+
+You need to be runnin Mac OS X running a recent version of Xcode. Testing with Xcode 4.5.
+